Update ESI UI to allow tenant users to control their node networking

[tzumainn]

Tenant users should be able to attach and detach networks from nodes. Let's leave trunks for another time, but allowing them to select a network or a port makes sense.

[ajamias]

I think that a good thing to do before updating the UI is to move the logic from python-esiclient's node network attach and detach to esisdk. And then both the UI and python-esiclient can call from esisdk

[ajamias]

Still gotta update the UI to use the changes in esisdk